Deck 11: Science

Question 1

Sebaceous glands are found in

A)dermis of skin of mammals
B)epithelium of intestine of frog
C)epithelium of stomach of frog
D)epidermis of skin mammals

Answer 1

dermis of skin of mammals

Question 2

One of the most resistant known biological material is

A)lignin
B)hemicelluloses
C)sporopollenin
D)lignocelluloses

Answer 2

sporopollenin

Question 3

Parthenogenesis is a type of

A)sexual reproduction
B)asexual reproduction
C)budding
D)regeneration

Answer 3

asexual reproduction

Question 4

Which one of the following is not correct about cathode rays?

A)They are deflected to the positive plate of electromagnetic field
B)The nature of cathode rays does not depend upon the nature of gas taken in the discharge tube
C)The nature of cathode rays depends upon the nature of gas taken in the discharge tube
D)Cathode rays are made up of material particles

Question 5

Cathode rays are produced when high electric voltage is applied to the gas held in a discharge tube at a pressure of about

A)10-3 atm
B)10-5 atm
C)1 atm
D)100 atm

Question 6

The electronic configuration of chlorine with atomic number 17 is

A)2, 8, 7
B)2, 9, 6
C)2, 10, 7
D)2, 9, 9

Question 7

A divalent cation has 10 electrons and 12 neutrons. The atomic number and mass number of the elements are

A)12, 24
B)10, 12
C)11, 25
D)8, 12

Question 8

The only elements having no neutron is

A)protium
B)deuterium
C)tritium
D)All of these

Question 9

?-particle are

A)double positive helium nucleus
B)single positive helium nucleus
C)neutral helium atom
D)None of these

Question 10

Neutron was discovered by

A)J J Thomson
B)James Chadwick
C)Goldstein
D)Rutherford

Question 11

Man made synthetic fibre is

A)wool
B)rayon
C)nylon
D)cotton

Question 12

Which one of the following statements is not correct?

A)All metals are solid at room temperature
B)All metals are good conductor of heat and electricity
C)All metals from basic oxides
D)All metals possess luster when freshly prepared

Question 13

Among metals, the poorest conductor of heat is

A)lead
B)tin
C)bismuth
D)mercury

Question 14

The correct order of electrical conductivity is

A)Al > Au > Cu > Ag
B)Cu > Ag > Al > Au
C)Au > Ag > Al > Cu
D)Ag > Cu > Au > Al

Question 15

Beakers A, B and C contain zinc sulphate, silver nitrate and iron (II) sulphate solutions, respectively. copper pieces are added to each beaker. Blue colour will appear to in case of

A)beaker A
B)beaker B
C)beaker C
D)All the beakers

Question 16

A particle is projected up with an initial velocity of 80 ft/s. The ball will attain height of 96 ft/s from the ground after

A)2.0 and 3.0 s
B)Only at 3.0s
C)Only at 2.0 s
D)After 1 and 2 s

Question 17

A stone is dropped into water from abridge 44.1 m above the water. Another stone is thrown vertically downward 1 s later. Both strike the water simultaneously. What was the initial speed of the second stone?

A)12.25 m/s
B)14.75 m/s
C)16.23 m/s
D)17.15 m/s

Question 18

Which one of the following statements is wrong?

A)Sound travels in straight line
B)Sound travels in the form of waves
C)Sound is a form of energy
D)Sound travels faster in vacuum than in air

Question 19

The process of respiration is concerned with

A)liberation of oxygen
B)liberation of carbon dioxide
C)liberation of energy
D)intake of oxygen

Question 20

Cyanobacteria are

A)bacteria
B)virus
C)algae
D)fungi

Question 21

Which one of the following statements is wrong?

A)Voltmeter should have high resistance
B)Ammeter should have low resistance
C)Ammeter is placed in parallel
D)Voltmeter is placed in parallel across the conductor in a

Question 22

A. The resistance of super conductor is zero. B. The super conductor are used for the transmission of electric power.

A)A and B are true
B)A and B are false
C)A is true and B is false
D)A is false and B is false

Question 23

The resistivity of a wire

A)increase with the length of the wire
B)decreases with the area of cross-section
C)decreases with the length and increases with the crosssection of a wire
D)None of the above

Question 24

Ohm's law is true

A)for gases at low temperature
B)for metallic conductor
C)for electrolytes when current passes through them
D)for diode when current flows